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TO ADJUST
CARBURETOR
The carburetor has been preset at the factory
and, adjustment should not be necessary.
However, minor adjustment may be required
to compensate for differences in fuel,
temperature,
altitude or load. If the carburetor
does need adjustment, proceed as follows:
In general, tuming the adjusting needles in
(clockwise) decreases the supply of fuel to
the engine giving a leaner fuel/air mixture.
Turning the adjusting needles out (counter-
clockwise) increases the supply of fuel to the
engine giving a richer fueVair mixture.
IMPORTANT:
Damage to the needles and
seats in carburetor may result if tumed in too
tight.
NOTE:
The carburetor on this engine is low
emission. It is equipped with an idle fuel
adjusting needle with a limiter cap, which
allows some adjustment within the limits
allowed by the cap. Do not attempt to remove
the limiter cap. The limiter cap cannot be
removed without breaking the adjusting
needle.
1. Be sure you have a clean air filter and the
throttle control cable is adjusted properly
(see above).
2.
Start engine and allow to warm for five
minutes. Make adjustments with engine
running and shift/motion control lever in
neutral (N) position.
3. Idle speed setting - With throttle control
lever in slow position, engine should idle
at 1750 RPM. If engine idles too slow or
fast, tum idle speed adjusting screw in or
out until correct idle is attained.
4.
!die fuel needle _etting - With throttle
control lever in slow position, tum idle fuel
adjustment needle in (clockwise) until
engine begins to die and then turn out
(counterclockwise)
until engine runs
rough. Tum needle to a point midway
between those two positions.
5.
Recheck idle speed. Readjust if neces-
sary.
ACCELERATION
TEST -
6.
Move throttle control lever from slow to
fast position. If engine hesitates or dies,
turn idle fuel adjusting needle out
(counterclockwise)
1/8 tum. Repeat test
and continue to adjust, if necessary, until
engine accelerates smoothly.
High speed stop is factory adjusted.
Do
not adjust - damage
may result.
IMPORTANT:
Never tamper
with the
engine governor,
which is factory set for
proper
engine
speed.
Overspeeding
the
engine
above the factory
high speed
setting can be dangerous.
If you think the
engine-governed
high speed
needs
adjusting,
contact
a Sears or other
qualified
service
center,
which has proper
equipment
and experience
to make any
necessary
adjustments.
Idle Speed
Adjusting
,d,e ue,
/
Adjusting-
I
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I
II liT"
--ill=----
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28
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